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YIN Jiehui, ZHANG Guangtao, LI Chaolun, WANG Shiwei, ZHAO Zengxia, WAN Aiyong. Community composition, abundance and biomass of zooplankton in Zhangzi Island waters, Northern Yellow Sea[J]. HaiyangYuHuZhao, 2017, 35(5): 1144-1151

Community composition, abundance and biomass of zooplankton in Zhangzi Island waters, Northern Yellow Sea

YIN Jiehui1, ZHANG Guangtao2, LI Chaolun3, WANG Shiwei2, ZHAO Zengxia2, WAN Aiyong2
1 Ocean College, Yan Tai University, Yantai 264005, China;
2 Jiaozhou Bay Marine Ecosystem Research Station, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;
3 Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
Samples were collected monthly from the sea area around Zhangzi Island, northern Yellow Sea, from July 2009 to June 2010. Vertical net towing was used to examine spatial and temporal variability in zooplankton abundance and biomass. Overall, Calanus sinicus and Saggita crassa were the dominant species found during the study period, while the amphipod Themisto gracilipes was dominant in winter and spring. Vast numbers of the ctenophore species of the genus Beroe were found in October and November. It was not possible to count them, but they constituted a large portion of the total zooplankton biomass. Zooplankton species diversity was highest in October, and species evenness was highest in April. Zooplankton abundance (non-jellyfish) and biomass were highest in June and lowest in August, with annual averages of 131.3 ind./m3 and 217.5 mg/m3, respectively. Water temperature may be responsible for the variations in zooplankton abundance and biomass. Beroe biomass was negatively correlated with other zooplankton abundance. Longterm investigations will be carried out to learn more about the influence of the environment on zooplankton assemblages.
Key words:    Jiaozhou Bay|copepoda|harpacticoida|species richness   
Received: 2016-05-04   Revised: 2016-06-27
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